Apparatus for forming briquettes



Feb. 12, 1929.

C. W. FERNHQLTZ APPARATUS FOR FORMING BRIQUETTES Filed Jan. 11. 1926 I N V EN TOR. CARL W. fZw/w-loLrz Patented Feb. 1%, i923.

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CARL WALTI-IER FERNHOLTZ, 01F LQS ANGELEFQ, CJdLIFOEtNIA, ASSIGNC R CPO/FERN- HOL'IZ MACHINERY COMPANY, OF LGS ANGELES, CALTHTQBNIA, A CORPORATION OF CALIFORNIA.

Application filed. January 11, was. Serial no. 80,4l76.

This invention pertains more particularly to a method of forming briquettes from a pulverulent material and it consists in expelling. substantially all the air therefrom a after its introduction to the compression chamber and also from the ch mber before finally compressing the material into briquctte form, whereby to greatly increase the density and hardness of the finished product.

Another object of the invention is the provision of an apparatus especially adapted for use in connection with the method above set forth in which the molding chamber is provided with air venting ducts in its noncompressing port-ion of the chamber for the exit of the air that is expelled from the material and chamber during the operation of the apparatus.

A further object is to provide simple mechanism for automatically preventing the clogging of the mold air venting duets with the briquetting material during the operation of the apparatus.

in briquette forming operations where lignite, coal or coke dust, and other compressible materials are employed, the inlet end of the mold chamber through which the compress ing material passes during the die forming operation cut-rains therein a certain percentage of air as well as the material, and also an excess of molding material, which if not expelled from the die chamber prior to a compressing operation oftentimes seriously affects the molded product.

By means of the present method of briquetting substantially all the air in the material to be compressed is automatically expelled therefrom togetherwith any air or excess material in the compressing chamber on an operation of the apparatus, the air vents leading from the molding or die chamber being continuously freed of material to prevent cloggin The above objects are accomplish d by means of the apparatus described in the following specification, reference being had to the drawings annexed hereto, in which:

Fig. 1 is a side elevation of a portion of a briqi'ietting apparatus showing the die mold chambers and the air venting means connect-ed thereto.

Figure 2 is a plan view of the same partly in section to show the disposition of the air venting ducts.

Fig. 3 is a transversesection taken online 3+3 of Fig. 2, looking in the direction of the arrows thereon.

l is an enlarged sectional detail of one side of the apparatus showing one ofthe vent ducts, and the material conveying means mounted therein. i

As the present invention relates specifically to a method for relieving the mold cavity of a briquetting apparatus and also. the molding material of any air that maybe entrained therein during a compressing operation, and also to expel any excess molding material not required, I have illustrated only such portions of an apparatus of usual form that directly appertains to my invention.

The apparatus herewith illustrated consists of a frame 5, provided with an elongated horizontally disposed molding cavity or chamber 6 open at either end, a vertically disposed material feeding chute '2' leading from the upper end of the frame and terminating at the rear end of the molding cavity, a material feed hopper 8, bolted to the frame communicating with the upper end of the material feeding chute 7, supplying and controlling the feed of material to the chute. The die plunger 9 is horizontally disposed in line with the molding cavity and is reciprocated back and forth in a mold forming operation by the usual reciprocating mechanism, not shown.

in order to expel any air from the molding cavity that may be entrained with the material being compressed on an operation of the plunger, and also to relieve the cavity of any excess molding material, two transversely disposed air vent bores 10, 11, are formed in the side walls of theframe, said bores preferably 7 the briquetting material is delivered thereto, 7

it will be apparent that any air that may be entrained with the molding material on an operation of the plunger Wlll be quickly eX-- 7 material therewith, means are provided for Continuously cleansing or freeing the bores of the material, and in the accomplishment of.

this end, a small conveyor 13 of screw form is mounted in each duct, the outer end of the shaft of each conveyor'being connected a.

universal coupling 14 with atransversely disposed operating shaft 15 mounted in a beam ing 16 secured by means of anarm 17 y to the Fig. 4 of the drawing. Each of shafts 15 beg yond the bearing 16 hassecured thereto a pulleyi 18', said pulleys being belted to other puL' leys 19 carried by the ends of a transversely disposed shaft 20 mounted in bearings 21secured to the top Wall of the frameof the apparatus. Shaft 20 is provided with a pulley 22 belted to a suitable sourceof power, not

shown; V V

In order that the vbriquetting material clelivered from the air vent bores may be conveyed away from the' app aratus, downwardly extending chutes 23,'disposed directly below each vent bore,'are provided, the falling material being conveyed away to a'suitable place of deposit by means ofa conveyor mechanism 24. of any suitable type. v V

It will thus be seen that by providing air- [vent bores leading, from the compressing mold cavity oi ybriquettmg niach1ncs, the

quality of the products is increased materially with respect to its density and'hardness.

VVhatI'claim is: a 1. In a briquettin-g apparatus a frame provided with a mold cavity having an air vent, and means mounted within said vent for maintaining the samet'ree otmolding material during the operation of the apparatus.

2. In a briquetting apparatus a frame provlded with a mold cavlty having an'air vent leading from said cavity adjacent its openmaterial feeding end, and means mounted in said vent for conveying material therefrom 

